Optical filter polarizer combination and laser apparatus incorpo

Details Optical filter polarizer combination and laser apparatus incorpo Optical filter polarizer combination and laser apparatus incorpo

1984-08-20

1986-03-11

Scott, Jr., Leon

Coherent light generators

Particular beam control device

372108, 372105, 372101, 350247, 350400, 350403, 350416, 350433, 350447, H01S 310

Patent

active

045758492

ABSTRACT:
The present invention deals with an optical filter polarizer combination providing a spacial transmission function to polarized incident light. When the light is in the form of a beam the combination may be used to reject extraneous light, or to modify the intensity profile of the beam as a radial or as a linear spacial function (orthogonal to the axis of the beam). The filter employs two lens elements of birefringent materials, with their crystal optical axes mutually orthogonal, and at 45.degree. to the plane of polarization. Spherical lenses are employed for a radial spacial function and cylindrical lenses are employed for a linear spacial function. The combination is useful for mode selection in a stable laser oscillator, for beam quality improvement in a stable/unstable oscillator, and for fill factor enhancement in coupling energy from a laser oscillator to a laser amplifier.

REFERENCES:
patent: 4461009 (1984-07-01), Lundstrom

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